Perforce provider stops working after Bamboo restart

When I create a build using Perforce for source control, it works fine immediately afterward. I can even build multiple times. But once I restart Bamboo, I get startup errors referring to Perforce, as well as messages in the error log:

Strack Trace

java.lang.NullPointerException
at com.atlassian.bamboo.repository.perforce.PerforceRepository.getSourceCodeDirectory(PerforceRepository.java:108)
at com.atlassian.bamboo.build.DefaultBuildChangeDetector.checkIfBuildNeedsBuilding(DefaultBuildChangeDetector.java:140)
at com.atlassian.bamboo.build.DefaultBuildChangeDetector.doTask(DefaultBuildChangeDetector.java:100)
at com.atlassian.bamboo.build.DefaultBuildChangeDetector.run(DefaultBuildChangeDetector.java:68)
at java.lang.Thread.run(Unknown Source)

If I then create a new build it will build, but then once Bamboo is restarted, both projects will fail from the get-go.

I've attached a clean logfile that includes starting the server for the first time, creating a build, building it twice, stopping the build, then trying to build the same build again with no changes to any configuration.

Thanks!